MAXAH 4 Ports USB 3.0 External Hub Adapter With Switch for PC Laptop HDD MP3 Mouse Super Speed 5Gbp 4 SuperSpeed USB 3.0 ports support data transfer rates of up to 5Gbps. Speed: USB 3.0 up to 5Gbp; USB 2.0 up to 480Mbps; USB 1.1 up to 1.5Mbps. 4 individual indicator LEDs show the working status of each USB ports. Compatible OS: Windows 2000 / XP / Vista / Windows 7 / Mac OS 9.X 10.X / Linux. there is a switches stands by each USB port.